I was part of a class action lawsuit against danone for their activia yogourt, they falsely represented some stuff in it and have lost. So now they have to pay back all their customers who purchased their activia yogourt between 01APR2009 and 06NOV2012 for the amount of 30$ to 100$.

If you can't find your grocerie bills, but bought activia, it's ok, you can still file a claim for the 30$. if you have kept your groceries bill, you can claim for the exact amount up to 100$.